Not sure if your AC issue is a quick DIY fix or a job for an HVAC technician? At Lenz Heating & Cooling, we hear this from Des Moines homeowners all the time.
The truth is, some basic air conditioning maintenance tasks are safe to do on your own—but others can be risky, complex, or even illegal without proper certification. That is why we have compiled a guide for you to know what you can (and should) do vs. what you should leave up to a professional.
What Homeowners Can DIY: Easy AC Maintenance Tasks
Before you reach for the phone, try these simple maintenance steps to improve your system’s performance and avoid unnecessary service calls.
1. Change Your Air Filter (Every 1–3 Months)
Replacing your filters regularly is one of the easiest ways to improve air quality and lower your energy bill.
Signs its time for a change:
- Restricted airflow
- Dusty vents
- Foul odors
Remember: If you have pets, are prone to allergies or asthma symptoms, or live in a humid climate, then you should change your filters more frequently
Pro tip: You can find new filters at your local home improvement store—making this convenient and cost-effective.
2. Cleaning the Outdoor Unit (AC or Heat Pump)
Overtime, leaves, grass clippings, and debris can easily clog up your outdoor AC condenser. If you take care of it—then it’ll take care of you.
How to clean it:
- Safety first: turn off power to the unit
- Gently remove leaves and debris by hand
- Hose off dirt from the coils.
3. Checking Your Thermostat Settings
Before assuming something’s broken, check your thermostat!
Make sure:
- It’s set to “cool”
- The temperature is accurate
- The batteries are fresh.
Still not working? Consider upgrading to a smart thermostat for added control and energy savings.
What You Shouldn’t DIY: AC Repairs That Need a Pro
Some parts of your HVAC system are complex, dangerous, or both. For these, it’s best to bring in an experienced technician—like our team here at Lenz Heating & Cooling in Des Moines.
1. Refrigerant Checks and Recharging
If your AC is blowing warm air or freezing up, it could be a refrigerant issue—but don’t grab a can and try to refill it yourself.
Pro-only zone: Handling refrigerant requires EPA certification and poses serious safety and environmental risks.
2. Duct Cleaning
Ductwork requires special tools—and often a crawlspace or attic adventure. Clean ducts mean better airflow, improved indoor air quality, and less strain on your HVAC system.
Call us if you notice:
- Uneven cooling
- Spiking energy bills
- Dusty air
3. Annual HVAC Tune-Ups
Prevention is the best course of action—which is why you should schedule an HVAC maintenance appointment at least once a year.
A professional tune-up includes:
- Deep cleaning
- Testing for leaks
- Checking for worn parts
- Ensuring everything’s operating efficiently.
Why it matters: Regular tune-ups help prevent breakdowns, reduce energy bills, and extend the life of your system.
Why Trust Lenz Heating & Cooling?
We’re more than just HVAC experts—we’re a family-owned local business with a reputation for honest, reliable service.
Here’s what you get with Lenz:
✅ Free Estimates on new systems
✅ 24/7 Emergency HVAC Service
✅ Upfront Pricing (what we quote is what you pay)
✅ Flexible Financing options
✅ 1,500+ 5-Star Google Reviews
Since 2009, we’ve proudly served Des Moines, West Des Moines, Ankeny, Urbandale, Altoona, and beyond.
Ready to Get Your AC System in Peak Shape?
Doing your part with simple maintenance goes a long way—but when it’s time for the tough jobs, we’ve got you covered. Whether you need an AC tune-up, furnace inspection, or emergency HVAC repair, we’re just a call away.
Scheduling an AC maintenance appointment is just a call—or a click—away!
